Engine temperature control device



Jan. 4,1949. R. w. FERNSTRUM ENGINE TEMPERATURE CONTROL DEVICE Filed Sept. 26, '1945 INVENTOR 2 Sheets-Sheet 1 H UH M AT TORN EYS R. W' FERNSTRUM ENGINE TEMPERATURE CONTROL DE VIC E Jan. 4, 1949.

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BY JQLWAMJ; AT T0 R NEY Patented Jan. 4, 1949 2,457,991 ENGINE TEMPERATURE CONTROL DEVICE Robert W. Fernstrum, Detroit, Mich., assignor to Gray Marine Motor Company, Detroit, Mich., a corporation of Michigan Application September 26, 1945, Serial No. 618,692

1 Claim. (Cl. 123178) The present invention relates to engine temperature control devices and more specifically to controls for marine engines.

Among the objects of the invention is a means for controlling the temperature of the cooling water being pumped through the water jacket of the engine.

Another object is a device of the sort indicated which will provide for quick warm up and for 2 to'5 and consists of a housing "A containing three chambers 2|, 22, and 23 or which chamber 2| is the inlet chamber, open to the water jacket through the flanged extension 2|A fixed over the Water jacket outlet 2IB.

Chamber 23 is the recirculation chamber and is connected to the return conduit l6. Chamber 22 is the outlet chamber to which is connected the conduit l8. The several chambers are sepamaintenance of optimum jacket temperature rerated by cross walls 24 and 25 provided with gardless of the initial temperature of the water axially aligned openings which also are in alignin which the boat happens to be and from which ment with a suitable tapped opening in the end source the cooling water is drawn for circulation wall 26 of chamber 2 land in the latter is mounted through the jacket. a thermostat unit 30 so constructed that changes Another object is means which will automatiin temperature produce an axial movement of a cally provide for recirculation of some or all of the plunger 3|. Mounted on the plunger 3| is a jacket contained water until the optimum temcylindrical valve member 32 open at its outer end perature is reached and apportion the recirculated and provided with a plurality of large openings water and added cool water to maintain such 33 in its bottom wall so that, under certain contemperature. ditions, water may fiow axially through the valve Other objects and advantages will be apparent member. to those skilled in the art upon reference to the The valve member 32 is of such diameter as following description and the accompanying to have a loose sliding fit in the opening through drawings in which F walls 24 and and is of such length as to extend Fig. 1 is a more or less diagrammatic sectional from the surface of wall 24, through wall 25 to view of a boat and power unit showing the prewithin a short distance of the end wall 21 or ferred location of the device and indicating its rather to a suitable seat 21A formed on the wall use. 21. It is also, as shown, provided with a small Fig. 2 is a sectional view on line 2-2 of Fig. 1. bevel 32A at its outer edge in order to provide Fig. 3 is a sectional view on line 3-3 of'Fig. 2. for smoother operation, the bevel producing a Fig. 4 is a section on line 4-4 of Fig. 2. less abrupt opening of the valve at this point.

Fig. 5 is a view showing a. portion of the sec- In assembling the unit ll, the thermostat unit tion of Fig. 2 with the parts in a different po- 30 with the valve member 32 is so located that, at sition. ordinary low temperature, the valve is in a po- In the drawings, a boat is indicated at ill with 35 sition approximately that of Fig. 2. That is, it a Suit ble en ine at I I. This is a water jacketed is in a position such that all or substantially all en ine and through the jacket, water is circuof the water from chamber 2| will pass longilated y a p p The inlet S de O pump tudinally through the valve to chamber 23 and connects with a c nduit l3 leading from a T back through conduit [6 to the pump l2. Under I 4 to which opens the short inlet conduit l5 ad- 40 such conditions, there is only a small quantity of mitting water from outside of the boat hull and water in t jacket and conduits n some. protected by 8. suitable shield I5A. TO the T quently 11-, quickly becomes heated,

I4 is also connected a conduit it connected at its As the water heats, t, of course heats t t o h r nd to he thermal control ni and mostat 3e and the valve 32 moves toward the t a t r s in rn m u t d o th n i so position of Fi 5 in which position the water from as to receive water from the water jacket of h chamber 2|, instead of passing through the chamengine A second conduit I8 is also connected t ber 23 and conduit l6, flows around the valve to the unit I1 and leads to a suitable point o (1 5- chamber 22 and out through conduit IE to be charge (not shown) overboard. discarded.

In operation, the pump l2 draw it S pp f Of course, with intermediate positions of the water from either or both of d i d 6 valve 32, the flow is divided between chambers and forces it through the engine jacket to the Hand 23 and more or less of the flow into chamunit IT. From the latter, discharge is through her 2| from the jacket is recirculated, while the either or both conduits l6 and I8. rest is discharged, such discharged water being re- The thermal unit I! is shown in detail in Figs. placed by flow into the system through inlet l5.

Itshould be noted that the diameter and length of the valve 32 and 33 may be such that the past it, or both, equals the inflow total flow through or from the Jacket and that consequently-no back pressure will dethe diameter of the openings I 4 mounted in alignment on a, screw plug, threaded into the end wall adjacent the inlet chamber and having the thermostat in said inlet cham ber supporting the valve extending through said partitions,.and a seat in the other end wall opposite the other end of said passage and into which the Y beveled end or said valve is adapted to move, said the specific details herein set forth, but only by the scope of the claim which follows.

I claim:

Temperature control means for water jacketed marine engines having a water circulating pump, said control means consisting of a casing having a water inlet connected to the water outlet of the engine jacket and having a pair of outlets for the water one outlet of which is connected to the intake of said pump and the other outlet leading to a point of discharge, said casing being divided by a pair of partitions into three chambers, an end one of which is the inlet chamber, said partitions and the end walls of said casing valve when the cooling water temperature is low, so located that water entering said casing is substantially all directed into the chamber leading to the pump and as said temperature increases is moved endwise by said thermostat to direct a, part of said water to the discharge outlet in being substantially parallel and provided with a 25 through passage, a unit consisting of a thermostat and a sleeve valve having a bevelednend.

increasing proportion.

ROBERT W. FERNS'I'RUM.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENT Drapeau Jan. 14, 1941 

